/*
 * Copyright © 2015 Stefan Niederhauser (nidin@gmx.ch)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package guru.nidi.graphviz.engine;

import java.util.regex.Pattern;

import static guru.nidi.graphviz.engine.Format.*;
import static guru.nidi.graphviz.engine.StringFunctions.replaceRegex;

class SvgImagePathsRestorer implements GraphvizPostProcessor {
    private static final Pattern LINK_PATTERN = Pattern.compile("xlink:href=\"(.+?)\"");

    @Override
    public EngineResult postProcess(EngineResult result, Options options, ProcessOptions processOptions) {
        if (options.format != SVG && options.format != SVG_STANDALONE) {
            return result;
        }
        return result.mapString(svg -> replaceRegex(svg, LINK_PATTERN, options::originalImagePath));
    }
}
